Amy Winehouse’s father, Mitch Winehouse, is on his way back to London after arriving in New York for a scheduled performance. Mitch was set to play at the Blue Note jazz club on Monday but has canceled his performance to be with family and friends.

According to Radar Online, authorities are set to have an autopsy performed on Amy Winehouse as early as Sunday.

London police are wasting no time in their investigation into the death of Amy Winehouse.

The controversial singer was found dead in her apartment Saturday afternoon, and RadarOnline.com has learned that her autopsy could take place within 24 hours.

“The postmortem has not been scheduled yet but it is unlikely to take place before tomorrow,” a Scotland Yard spokesman tells RadarOnline.com exclusively. “In the case of a murder it can be done within hours but this is not the case so tomorrow or even Monday is more likely in these circumstances.”